- a luxury EDC knife from Italy
A few years ago,
Lionsteel released a knife named the T.R.E.—standing for "Three Rapid Exchange"—referencing its three opening methods and a clever feature that allowed both the flipper tab and the thumb stud plate to be unscrewed. It was considered so innovative that it won the "Overall Knife of the Year" award that same year.
That was back in 2015, so what could be more fitting than to mark its tenth anniversary in 2025 by releasing a model that serves as both a tribute and an upgrade—taking things a step further in every respect?
The knife was named Q4ttro. Both the name and the spelling hint at what it is all about. But more on that later.  |
| Lionsteel Q4ttro |
Just like its predecessor and the majority of knives in LionSteel’s catalog, it is designed by Molletta—whose real name is Michele Pensato*. If you are familiar with his work, it is not difficult to spot both his design elements and LionSteel’s specialties in this knife. I am thinking, for instance, of details such as rounded blade spines and the micro-pattern found on the titanium scales.
In terms of technology, the Q4ttro is also at the forefront regarding materials and, to some extent, innovations—even though it doesn't come close to the "spaceship" in LionSteel's catalog that is the ROK**.
I have previously reviewed the T.R.E.—the model this knife succeeds—although the version I own, strangely enough, lacks the very system that gave it its name.
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| Q4ttro är resultatet av ännu ett samarbete mellan Lionsteel och Molletta. På bilderna ovan är den ena flipperfenan avlägsnad |
As is typical for LionSteel products, the Q4ttro comes in several versions. This particular model is made entirely of titanium, but it is also available with a presentation-side scale made of Micarta, G10, or carbon fiber. It is worth noting that the G10 and Micarta versions feature a G10 backspacer instead of a titanium one.
Short version: Lionsteel Q4ttro, a very likeable EDC knife made of exclusive materials, although perhaps with an opening method too much.
Blade
The blade shape is not unique in any way—neither for knives in general nor for LionSteel. However, the proportions bear the unmistakable stamp of Molletta, even if the belly is slightly less pronounced than is typical for his designs. It is clearly a drop-point blade, an appearance enhanced by a small swedge that both accentuates the lines and thins out the tip, making it more effective. The blade’s most distinctive feature is, of course, the prominent nail nick—or rather, the cutout that passes all the way through the blade to form a narrow, rectangular hole. It serves two functions, a point I will return to later.
The blade is 84 mm long and 3.8 mm thick—quite substantial for a knife of this size. The blade height is 25 mm.
The blade features a transverse semi-gloss satin finish. Markings are present but well-chosen in terms of format: small and relatively discreet. The presentation side displays the Lionsteel logo, along with "Maniago" and the steel type. The text "Molletta" appears on the opposite side.
As is typical for Lionsteel knives, the spine is rounded. This also applies to the transition between the blade and the base of the flipper tab—all examples of the attention to detail at which they excel.
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The steel in this knife is of the same high quality as all the other materials—or how about CPM MagnaCut?
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Like the other materials used in this knife, the blade steel is of the highest quality—take CPM MagnaCut, for instance. It is one of the latest materials generating buzz among enthusiasts—or rather, the online community. It is a so-called "super steel" that truly lives up to the name, offering exceptional corrosion resistance while also being capable of taking and retaining a razor-sharp edge. But the benefits don't stop there; this powder steel is also tough—a quality that is often difficult to combine with the others. This means the edge is highly resistant to chipping, something that cannot be said for all stainless steels.
Another somewhat unique characteristic is that MagnaCut—unlike other high-performance steels such as S90V and M390—is relatively easy to sharpen. The reason lies in having less chromium, both figuratively and literally: the carbides are smaller, making maintenance easier, and the percentage content is lower. In any case, we are talking about the *crème de la crème* here—among the finest steels you can find in a folding knife.
Of course, this assumes the steel has been properly hardened and heat-treated—something LionSteel has faced criticism for in the past. However, I must admit I haven’t experienced any issues with their knives. I suspect this is because my testing simply involves using the knives—albeit intensively and far more than I would under normal circumstances. I never try to "kill" them with insane stress tests or push the materials to their limits by forcing a failure. Nor do I test the knives using my own Rockwell tester or other machinery; I leave that to the metallurgy enthusiasts.
In this case, the hardness is rated at 60.5–62.5, which should be perfectly adequate for this type of steel. I certainly haven't noticed it being soft in any way.
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| The Q4ttro features a sleek drop-point blade with a slightly shallower belly than some other models from Molletta. |
However, geometry and grind can be more important than the choice of material, and on that point, I have to offer some criticism. Lionsteel hasn't quite dared to trust the material enough to grind it sufficiently thin behind the edge. As it stands, the Q4ttro measures around 0.7 mm. MagnaCut is definitely capable of performing well with a thinner grind. I would like to see that figure nearly halved, or at least brought down below 0.5 mm.
The Q4ttro doesn't cut poorly—the factory edge was sharp enough—but it doesn't cut quite as well as it could have.
Overall, however, I find this blade shape and size optimal for EDC use. It offers both a straight edge and a belly to work with. The latter is important in my book, as it facilitates tasks performed against flat surfaces; for instance, you can't perform small "rocking cuts" with a completely straight edge. The size provides enough edge for most tasks I can think of, with the exception of the very heaviest ones—though for those, it might be time to switch to a fixed-blade knife anyway.
I also like the tip, which is sharp enough for the small tasks I use it for. It is thin without being too fragile.
Although the Q4ttro doesn't have the best edge geometry, the full flat grind helps the blade glide through most materials with ease—especially everyday materials like cardboard and various types of plastic. The quality of the steel is evident in the long intervals between maintenance sessions. However, while writing this review, I noticed a small nick in the edge; I plan to grind it out and, while doing so, consider whether to slightly reprofile the blade.
Handle
If the blade’s standout feature is its superb material, the same can be said for the handle. It is made of titanium, a material used for the handle scales, backspacer, and pocket clip alike. Additionally, the presentation side features an inlay of multicolored carbon fiber. Yet, the defining characteristic of this knife is not the material itself, but rather how it has been finished; there are both major and minor details here worth examining.
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A handle made entirely of titanium, including the backspacer. The presentation side features an inlay of "marble fat carbon fiber".
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Lionsteel has many integral knives in its lineup, but the Q4ttro is not one of them; instead, this version features two standard titanium handle scales. Yet, "standard" doesn't quite do them justice, as they are more extensively machined than most knives.
The most obvious feature is the handle's brown-bronze anodized finish. Additionally, the presentation side has a milled recess designed to house a decorative carbon fiber inlay. It is also evident that care has been taken to round and bevel the edges. Lionsteel has even rounded the interior of the blade channel in an exemplary fashion—a detail that is sometimes overlooked. Simply put, the entire knife is exceptionally well-made.
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| Everything is titanium, from the finely rounded sides with their micro-pattern to the "floating" back spacer. |
The same applies to the minimalist clip mount and—not least—the fact that, despite the knife not being a heavyweight, the interior has been skeletonized to reduce weight. There is a cutout beneath the carbon fiber, and even the lock bar has been lightened. Another detail on the handle scale is the triangular pivot screw; naturally, this prevents it from spinning freely when the blade tension needs adjustment. There is also a dedicated "landing zone" for the index finger when using the flipper mechanism; rather than a sharp edge, there is a recess that allows the finger to land more softly.
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| There are many details to examine on the Q4ttro, such as the quality of the chamfering where the index finger lands after using the flipper tab, the clip attachment, or the triangular pivot screw. |
The attention to detail doesn't stop there; it is also worth noting that all the screws are driven in from the same side. The three screws holding the knife together are of the Chicago-screw type, preventing the threads from cutting directly into the titanium. They are T6 size—except for the pivot screw, of course, which is a T8. The only screws threaded directly into the titanium are the ones securing the carbon fiber scale. That scale, incidentally, is of high quality. The only potential criticism—if one must find one—is that its edges are quite noticeable to the touch.
Surrounding the perimeter is a reinforcement resembling a metal bolster. The entire handle features an intricate pattern that adds visual interest while providing some tactile feedback—though I wouldn't go so far as to say it makes the grip more secure.
Finally, we come to the backspacer, which is also crafted from the same anodized titanium as the rest of the handle. It is also what is sometimes referred to as a "floating" backspacer; its shape does not cover the entire spine, leaving sections open.
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| The handle is simple, fairly straight, and well-shaped, making it suitable for any grip. |
Its size is comparable to the TRE, as the handles share significant similarities. However, everything here is slightly larger—measuring 112 mm in length, 12 mm in thickness, and around 25 mm in height—so it fills the hand better than its predecessor.
This size also allows all four fingers to fit perfectly. While the handle’s construction and details are sophisticated, its shape is not; rather, it is deceptively simple—the kind of simplicity found in great design that just works. It remains fully functional regardless of the grip: whether using a standard hammer or saber grip, holding the knife edge-up, or employing a reverse grip. It handles just as well in a pinch grip as it does in a full fist. Simply put: it is well made.
Opening and Lock
Beyond its fine materials and attention to detail, this is the area where the Q4ttro is meant to shine. It boasts no fewer than four different ways to open the blade. Two—or perhaps even three—of these methods involve the nail nick or the hole in the blade, while two are linked to the dual flipper tabs. The question that immediately arises is: do they work well, or is it a case of quantity over quality?
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| Here lies a partial explanation for the knife's name: it can be opened in no fewer than four different ways! |
First, the knife can be opened using two hands. This is done quickly by gripping the cutout, which offers a good hold for the purpose. Nothing complicated there. That same cutout also serves as a blade hole—Spyderco style. However, given how narrow it is, the functionality isn't quite on the same level; you have to hit the right spot and press your thumb down firmly against the blade itself to generate the necessary friction. Once you do that, it works reasonably well—after all, the blade runs on ball bearings. Then there is the same rule that applies to other knives with this type of lock: you absolutely must not place a finger on the lock bar. That extra pressure makes it very difficult to deploy the blade.
The same notch or cutout also allows someone with a bit of manual dexterity to use a flick of the index finger from the other side to deploy the blade. The function isn't perfect here either; the resistance is tuned to accommodate the other two opening methods. But if you get the technique right, it works well enough.
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| The Q4ttro also features LionSteel's "REF" system, which means the flipper tab can be removed. |
Then, it’s hard to miss the two flipper tabs. One is elegant, the other ugly. One is removable, the other fixed. The standard one—or the one on the spine, depending on your preference—is equipped with a so-called REF system, which is LionSteel’s name for a detachable flipper tab. The knife generally looks much better without it, but since it offers the best way to open the blade, I put it back on. It isn’t perfect, though; it’s quite small and somewhat angular in shape. That said, it’s better than having your finger slip off. It works reasonably well for a LionSteel, though snappy openings have never been their forte.
I am not, however, a big fan of the front flipper. If you turn the knife sideways in your hand and plan your move, it works. But it is neither small nor discreet. This is likely because it has to be large—a necessity arising from the fact that the tip area is already occupied, forcing the flipper tab lower relative to the pivot screw, which affects the geometry.
So sure, there are four opening methods, and all of them work, though perhaps none stands out as the absolute best.
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| Den här kniven har ett välfungerande ramlås |
The lock is straightforward. It is a well-made titanium frame lock featuring all the associated attributes—namely, a replaceable steel lock-bar insert with an overtravel stop. There is little more to say other than that it works well. The blade is held securely in place with no play in any direction, and the lock bar is easily accessible for disengagement thanks to the generous cutout in the handle scale.
To Carry
The Q4ttro weighs in at 106 grams. It isn't particularly heavy, and as I mentioned earlier, the handle is 11.2 cm long—nothing to be concerned about there, either. All in all, it’s a comfortable knife to carry in your pocket. Admittedly, metal parts protrude from the front end like a miniature airplane graveyard, but none of them snag on anything. The larger one points downward into the pocket—so don't keep anything else in there—and the other is fairly low-profile, albeit a bit too angular for my taste.
As for the surface finish, it doesn't interfere with either drawing or stowing the knife; the titanium's micro-pattern has no impact on that aspect of handling.
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| The clip is a milled titanium clip that matches the knife's appearance well and also performs effectively. |
Another positive feature is that the clip—despite being a milled titanium design—works excellently. Sometimes you encounter versions of this type of clip that are essentially just a metal hook; that is not the case here. It is an elegant clip that complements the knife’s appearance well, especially since it shares the same color and pattern as the rest of the handle.
LionSteel opted to secure it with just a single screw, but a small locating pin prevents the clip from twisting sideways.
Its functionality benefits from the decision to keep the profile slim; this ensures sufficient tension to easily slip it over the edge of a pocket—such as on a pair of jeans. It handles most fabric thicknesses well, though perhaps not much beyond that.
To Conclude
In my opinion, the Lionsteel Q4ttro is a rather particular knife. I knew somewhat what to expect, as I own other knives from them designed by Molletta, yet there were still some surprises. I anticipated a highly refined knife featuring patterned, chamfered, and ground surfaces throughout. The specifications also hinted at top-tier materials—particularly the blade steel; while MagnaCut certainly wasn't brand new to the market, it was relatively untested in this specific context when the knife was released last year.
The promotional material also gave a hint as to how the knife could be opened—something I was naturally curious about!
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| Q4ttro is an excellent EDC knife—shown here alongside the TRE, the knife it pays tribute to and which preceded it. |
However, I do have to offer some criticism in that regard. More options don't necessarily mean better. For one thing, there is a risk that the blade resistance isn't optimal for any single opening method. For another, the knife feels "cluttered" at the front end, featuring no fewer than four different opening methods—two of which are flipper tabs. As a side note, I also find that aspect less visually appealing.
Having multiple methods can also be tricky for experienced knife users, as you might find yourself hesitating over which one to choose. That said, it is something you can get used to with practice. For a while, I used the thumb hole without the spine flipper, but since the flipper works best, I ended up putting it back on.
I cannot help but conclude that, in this case, it is likely more a matter of realizing an idea than a considered decision based on necessity. "Three" was to be celebrated—and this through both "more" (in terms of scale) and "more" (in terms of an additional opening method).
I also feel that Lionsteel hasn't fully utilized the potential of MagnaCut. My advice, once again, is to go all out and keep the edge thin. After all, this is a small—well, not *that* small—folding knife intended for EDC use, not a tool for building shelters. But there’s bound to be some crazy YouTuber who manages to snap a blade. Unfortunately, that type of review contributes to some manufacturers designing their knives accordingly.
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| Lionsteel Q4ttro has stayed with me right into the autumn |
It is also worth noting that the
Lionsteel Q4ttro features a well-crafted handle that offers great comfort. I might not go so far as to call it an ergonomic masterpiece—I reserve that distinction for another Lionsteel model, the TM1—but it is certainly very good. The blade shape also makes for a highly capable EDC knife.
The fact that it is also a handsome knife (with the possible exception of the front flipper) certainly doesn't hurt. All in all, it is a highly potent knife with plenty of details for the enthusiast to examine and appreciate. I therefore recommend it to anyone looking for a sophisticated folding knife made from top-tier materials—one that stands out from the crowd. It has that special something: personality.
The recommended price on the website is €320, with retail prices in Europe starting at that figure and going up.
Specifications:
Length Overall: 200 mm
Length Folded: 112 mm
Weight: 106 g (weighed by me; stated 92 g, but I suspect that's for the Micarta version)
Blade Length: 84 mm
Blade Thickness: 3,8 mm
Blade Steel: CPM Magnacut
Handle: Titanium
Lås: Frame lock
Produced by: Lionsteel, made in Italy
/ J - treats himself to Italian luxury
He is both a knifemaker and a designer, and is the creative force behind most of Lionsteel’s more advanced models. In total, this amounts to nearly sixty (!) models when all variants are included. Examples include fixed-blade knives such as the Acha, T-series, M-series, and B40, as well as folding knives like the SR11, ROK, SR22, TM1, Skinny, and, of course, the T.R.E.
** There are grounds for calling the Lionsteel ROK the world's most technically advanced folding knife.